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Divisions of the Human Nervous System

2.
Divisions of the Human Nervous System
Autonomic Nervous
System
Cerebro-Spinal
System
 Sympathetic
System
 Parasympathetic
System
 Central Nervous
System
 Peripheral Nervous
System

3.
Autonomic or Sympathetic
Nervous System
 acts as a control system functioning
largely below the level of consciousness,
and controls visceral functions.
 many of its activities are
“autonomous” or “self-regulating”

4.
2 Divisions / Systems of Autonomic NS
Sympathetic System
 consists of nerves and
ganglia
 acts as a unit; is active
in emotion
 stimulates the body only
for using energy
 involved in the “fight or
flight” response during
emergency situation or
in high emotion
Parasympathetic
System
 composed of fibers from
the cranial region
 sometimes called “rest
and digest” system as it
quiets the body and
returns it to a lower
intensity of arousal. It is
involved in relaxation. It
conserves energy and
controls sedentary

5.
Cerebro-Spinal System
 The portion of the nervous system comprising the
brain, cranial nerves, spinal cord and the spinal
nerves concerned with transmission of impulses
from sense organs to the voluntary muscles
The brain and spinal cord is protected by three
meninges
Dura mater
Arachnoid
Pia mater

6.
Central Nervous System
The central
nervous system
(CNS) is the
processing
center for the
nervous
system.